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Physics: Must Pass
I have to pass physics.
| Question | Answer |
|---|---|
| standing wave | incident and reflected pulses are created with periodic frequency; appears stationary |
| node | point with complete destructive interference (zero energy) |
| antinode | largest amplitude; 1/2 way between nodes |
| infrasonic | frequencies below 20 Hz |
| Ultrasonic | frequencies above 20,000 Hz |
| Pitch | measure of how high or low a sound is; frequency of sound wave |
| wave fronts | 3-D distribution of waves (a sphere) |
| Plane waves | seem like a straight line |
| timbre | quality of tone resulting from the combination of harmonics present at different intensities (sound quality) |
| chromatic scale | 12 note scale; 13th note is twice 1st notes frequency |
| beat | periodic variation in amplitude of sound wave that is the superposition of two waves of slightly different frequencies |
| beat frequency | difference in frequencies of two similar sound waves |
| amplitude | max displacement from equilibrium |
| wave length | distance between identical positions on consecutive waves |
| frequency | number of waves passing a fixed point per unit time |
| period | time required to complete a cycle |
| wave | motion of a disturbance to a medium |
| medium | matter through which wave travels |
| mechanical waves | one that requires a medium to travel through |
| electromagnetic waves | doesn't require a medium |
| pulse wave | wave made of one traveling pulse |
| periodic wave | wave made of periodic and continuing pulses |
| simple harmonic motion | created by continuous pulses (periodic wave); follows rules for sine waves |
| transverse wave | wave with vibration perpendicular to direction of wave's motion |
| longitudinal wave | wave with vibration parallel to motion of wave (sound) |
| sympathetic vibrations | vibration caused by resonance; starts vibrating because of the waves of second object |
| resonance | phenomenon that occurs when the frequency of a force applied to a system matches the natural frequency of vibration of the system, resulting in a large amplitude of vibration |
| fundamental frequency | lowest frequency of vibration of a standing wave; also called 1st harmonic |
| harmonics | fundamental and successive multiples of the fundamental |
| intensity | rate at which energy flows through a unit area perpendicular to direction of the waves motion |
| threshold of hearing | 1000 Hz |
| Threshold of pain | 1.0 W/M^2 |
| relative intensity | intensity of wave divided by intensity of threshold of hearing |
| decibel level | measure of loudness |
| compression | high density/peak |
| rarefaction | low density/trough |
| wave speed | distance traveled per time |
| damping | amplitude of a wave diminishes over time due to energy loss |
| super-position | combination of two overlapping waves |
| interference | interaction of two waves |
| constructive interaction | two waves add in same direction |
| destructive interaction | two waves subtract due to a + and - amplitude |
| reflection interaction | bouncing back of a wave at a boundary |
Created by:
shanecolonialdrive
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